riiAcio.—Ni:o Bonus. s 249 



of ventral, nearer end of smut than caudal. x\nal III 7-S. Pectoral a 

 little more than | or nearly -^ length of head. Caudal with pointed 

 lohes. Caudal peduncle 5 to G times as long as deep. Scales obtusely- 

 keeled, 42-4-3 ^^, 2 between dorsal fin and lateral line series, 8 round 

 caudal peduncle, Ih'own above, whitish beneath, often with alternating 

 darker s]K)ts on the back and sides, or with a dark lateral baud ; doi'sal 

 and caudal oiange or sahnon-jnnk, UNually with black bands, disposed 

 horizontally on the former, obliquely on each lobe of the latter; paired 

 fins and anal yellow or blackish. 



Total length 160 niillim. 



Upper Congo. 



1. Type. Kinshassa, IStanley Pool. M. A. Greslioff (C); 



Utrecht University (E ) . 



2. Ad. Leopoldvillo, „ Capt. Wilverth (C). 

 o. okel. ,, ,, 55 



4. Ad. Bangala Province. U. De Meuse (C). 



5. Ad. Irebu. M. P. Delhez (C). 



6. Ad. Kutu, Lake Leopold IL „ 



7. 8. Ad. & yg. Moiiseinbe. Rev. J. H. Weeks (P.). 

 9. Ad. " Stanley Falls. Rev. W. H. Bentley (C). 



11. NEOBOEUS. 



Bouleng. Ann. Mus. Congo, Zool.i. p. 78 (1809), and Poiss. Bass. Congo, p. 171) (1901). 



Snout long and narrow, pointed ; mouth large ; upper jaw movable 

 upwards ; maxillary very small, hidden under the prreorbital when the 

 mouth is closed; pniemaxillary and dentary with a single series of teeth, 

 the anterior large and canine-like, the laterals pointed, compressed, the 

 point directed backwards, some with a small secondary cusp. Cheek 

 partly naked ; nostrils near the eye, close together, separated by a valvular 

 flap ; gill-membranes narrowly united to isthmus. Body elongate, 

 compressed. Scales small, strongly ciliated; lateral line straight, along 

 the middle of tlie side ; a scaly process at base of ventral. Dorsal fin 

 with 16 to IS rays, beliind vertical of base of ventrals ; anal with lo to 

 19 rays ; adipose dorsal fin small. Ycrtebia} 43 (24 + 10). 



Congo, Casamanza lliv(M-. 



Two species : — 

 DoTcal originating well behind vertical of 



base of ventral ; Sc. 98-110 [^. . 1. X or>ia/us, Blgr., p. 250. 



Dorsal originating immediately behind 



vertical of ba?e of ventral; Sc. 90 |^. 2. A'. qvodvUineatus, Pellpgr.. p. 2.51. 



